PH27860: MQP2,ABN=5C6-00D40082 CSQMLPLM.CSQMFENR, FAILED ON MQ-COMMIT COMPCODE: 2 REASON CODE: 2195

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• The reason for the abend is due to a cluster registration leak
  that is causing the registration area to fill up to a much
  larger size than expected. The mechanisms used in MQ to enlarge
  the registration area when this is legitimately required is not
  currently able to handle the increase of size by more than 16
  MB in one instance
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of IBM MQ for z/OS Version 9       *
  *                 Release 1 Modification 0 and Release 2       *
  *                 Modification 0.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: If a cluster QMGR object changes while  *
  *                      applications have its cluster queues    *
  *                      open, then a storage leak may occur in  *
  *                      the local QMGR's cluster registration   *
  *                      area.                                   *
  *                                                              *
  *                      The storage leak would be most          *
  *                      noticeable when a REFRESH CLUSTER       *
  *                      command is processed while there are    *
  *                      many cluster queues with open handles.  *
  *                      Repeated storage leaks may lead to an   *
  *                      abend 5C6-00D40082.                     *
  ****************************************************************
  When using MQOO_BIND_ON_OPEN or MQOO_BIND_ON_GROUP, the
  destination QMGR is bound on the MQOPEN. The binding persists
  over resultant puts and commits, until either the queue is
  closed, or the last group message is put. If the destination
  cluster QMGR object changes, then depending on the previous
  MQAPI calls, the new cluster QMGR object may be leaked. This can
  lead to a build up of leaked storage in the cluster registration
  area, which in extreme cases, can lead to an abend 5C6-00D40082.
  

Problem conclusion

• The storage leak has been resolved.
  
  The IBM MQ for z/OS Version 9.1.x and Version 9.2.x Knowledge
  Center are updated:
  IBM MQ 9.1.x/9.2.x
   IBM MQ
    Reference
     Messages
      IBM MQ for z/OS messages, completion, and reason codes
       IBM MQ for z/OS codes
        Message manager codes (X'D4')
  (https://www.ibm.com/support/knowledgecenter/en/SSFKSJ_9.1.0/
                               com.ibm.mq.ref.doc/codes_d4.html )
  (https://www.ibm.com/support/knowledgecenter/en/SSFKSJ_9.2.0/
                               com.ibm.mq.ref.doc/codes_d4.html )
  Added code 00D400B9:
  "
  00D400B9
    A cluster cache allocation request exceeded the maximum
    allowed size.
  
  System action
    The current execution unit terminates with completion code
    X'5C6'.
  
  System programmer response
    Collect the items listed in Diagnostics and contact your IBM
    support center.
  "
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  UI75234 UI75235

Modules/Macros

• CSQMFACA CSQMPCHS
  

Fix information

• Fixed component name

  IBM MQ Z/OS V9

• Fixed component ID

  5655MQ900

Applicable component levels

• R100 PSY UI75235

     UP21/05/29 P F105 ¢

• R200 PSY UI75234

     UP21/05/29 P F105 ¢

Fix is available

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